Materials Literature
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The design of artificial nonlinear materials requires control over internal resonant charge densities and local electric field distributions. We present a MM design with a structurally controllable oscillator strength and local electric field enhancement at terahertz frequencies. The MM consists of a split ring resona…
The photoelectrochemical activity of the PbTiO3 film photocathode deposited on indium tin oxide-coated quartz substrate was significantly improved through modifying the film surface by both the Fe(III) doping and grafting. Doping the PbTiO3 with Fe(III) ions narrows its band gap thus increases the visible light utiliz…
We propose a phase-controlled heat-flux quantum valve based on the proximity effect driven by a superconducting quantum interference proximity transistor (SQUIPT). Its operation relies on the phase-dependent quasiparticle density of states in the Josephson weak-link of the SQUIPT which controls thermal transport acros…
Natural materials are promising alternatives to synthetic materials used in tissue engineering applications as they have superior biocompatibility and promote better cell attachment and proliferation. Ovalbumin, a natural polymer found in avian egg white, is an example of a nature-derived material. Despite the availab…
OBJECTIVES: The aim of this study was to obtain valuable information about the effect of ultrasonic irradiation with a frequency of 30 kHz frequency and power of 100 W on the inactivation capability of two bacterial groups, namely, Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC 25923, in physiologic water…
Abstract Three new compounds were formed between decavanadate and diprotonated metformin (H 2 Metf) at different pH values and in the presence or absence of ammonium cations, namely, [H 2 Metf] 3 [V 10 O 28 ] · 8H 2 O ( 1 ), [H 2 Metf] 2 [NH 4 ] 2 [V 10 O 28 ] · 10H 2 O ( 2 ), and [H 2 Metf] 2 [NH 4 ] 2 [V 10 O 28 ] ·…
This paper presents a study on physical properties of bamboo & bamboo-cotton(50:50) blended yarn fabrics which are commonly used for apparel production. Yarns of 4 different counts such as 20, 24, 30 & 40Ne were used as warp & Weft in bamboo & bamboo-cotton blended yarn fabric. All fabrics were produced in plain weave…
Few-layer graphene films were synthesized through chemical vapor deposition technique using coal char as solid carbon source. Raman spectroscopy, X-ray diffraction, transmission electron microscopy, and selected area electron diffraction were used to characterize the graphene films. The electrochemical performance of…
Nano-polycrystalline boron nitride (BN) is expected to replace diamond as a superhard and superstiff material. Although its hardening was reported, its elasticity remains unclear and the as-measured hardness could be significantly different from the true value due to the elastic recovery. In this study, we measured th…
Electrical properties and corresponding structural features of Cu-Mn alloy films with potential application as barrier and interconnect layers were studied. Cu-Mn films were deposited by DC magnetron sputtering at room temperature on SiO2 substrates. Electrical resistivity measurements were made as a function of film…
This study reports the direct preparation of graphene-based films using magnetron sputtering of graphite target. The nanomaterial was deposited at a low temperature of 620 °C on silicon wafers and on metallic foils including aluminum. The films were used in fabrication of supercapacitors with a planar geometry. Electr…
This paper aims to investigate the possibility to modify the rheological properties of hydrogels based on Laponite RD/poly(ethylene oxide) by adding small amounts of chitosan to improve their elasticity. The continuous shear measurements of the hydrogels in the presence/absence of chitosan have revealed a pseudoplasti…
We synthesized colloidal InP/ZnS seeded CdS tetrapods by harnessing the structural stability of the InP/ZnS seed nanocrystals at the high reaction temperatures needed to grow the CdS arms. Because of an unexpected Type II band alignment at the interface of the InP/ZnS core and CdS arms that enhanced the occurrence of…
Despite the noble electronic properties of graphene, its industrial application has been hindered mainly by the absence of a stable means of producing a band gap at the Dirac point (DP). We report a new route to open a band gap (Eg) at DP in a controlled way by depositing positively charged Na+ ions on single layer gr…
Lead-free (1 − x)BaTiO3-x(Na0.5Er0.5)TiO3 (0 ≤ x ≤ 0.15) ceramics were prepared by a solid state reaction method. Their structure and electric properties were analyzed. Rietveld refinements suggested that the ceramics crystallized in the tetragonal perovskite space group P4 mm at room temperature. With increasing x fr…
The quasiparticle interference (QPI) patterns in ${\mathrm{BiS}}_{2}$-based superconductors are theoretically investigated by taking into account the spin-orbital coupling and assuming the recently proposed ${d}_{{x}^{2}\ensuremath{-}{y}^{2}}^{*}$-wave pairing symmetry. We found two distinct scattering wave vectors wh…
Understanding how defects in solids interact with external electric fields is important for technological applications such as memristor devices. Using Density Functional Theory (DFT) calculations, we have studied the influence of an external electric field on the formation energies and diffusion barriers of surface a…
We report the change in the type of band alignments due to an increase in the dopant (Mg) concentration in pulsed laser deposited ZnO/MgZnO bilayer film. The band offset measurements were carried out from the core level shifts as well as valence band maxima in the single as well as the bilayer films. The change in the…
We employ semilocal density functionals [local spin-density approximation (LSDA), Perdew-Burke-Ernzerhof (PBE) generalized gradient approximation (GGA), and meta-GGAs)], LSDA plus Hubbard $U$ (LSDA+$U$) theory, a nonlocal range-separated Heyd-Scuseria-Ernzerhof hybrid functional (HSE06), and the random-phase approxima…
Cryogenic transmission electron microscopy (cryo-TEM) is utilized to determine the second virial coefficient of osmotic pressure of PbSe quantum dots (QDs) dispersed in apolar liquid. Cryo-TEM images from vitrified samples provide snapshots of the equilibrium distribution of the particles. These snapshots yield radial…